Fix example tests (#32)

src/main.ts

@@ -7,7 +7,7 @@ async function run() {
     console.log(`Waiting ${ms} milliseconds ...`)
 
     core.debug((new Date()).toTimeString())
-    await wait(parseInt(ms));
+    await wait(parseInt(ms, 10));
     core.debug((new Date()).toTimeString())
 
     core.setOutput('time', new Date().toTimeString());

src/wait.ts

@@ -1,7 +1,7 @@
-export function wait(milliseconds) {
-    return new Promise((resolve, reject) => {
-        if (typeof(milliseconds) !== 'number') { 
-        throw new Error('milleseconds not a number'); 
+export function wait(milliseconds: number) {
+    return new Promise((resolve) => {
+        if (isNaN(milliseconds)) { 
+            throw new Error('milleseconds not a number'); 
         }
 
         setTimeout(() => resolve("done!"), milliseconds)